I have a colony of about 13 adult hissers in a 20L tank (along with a growing number of darkling beetles, their offspring, and a few giant cave nymphs), and for the past few months I have had a problem with some of my males (I think there may be 4 of them) ending up with missing bits of antennea and in the case of my biggest male, a toe or two. I read that this is often a sign of territorial scuffles and chose to let them sort things out for themselves (so long as nothing got worse). However, I currently have two females who are also missing the ends of their antennae- ???? The size of the enclosure allows them more than enough room and I have been offering them food with a higher protein content somewhat in response to this discovery.
Anyone ever have this problem/have any idea what's going on (or what I am doing wrong)???